NO760840L - - Google Patents
Info
- Publication number
- NO760840L NO760840L NO760840A NO760840A NO760840L NO 760840 L NO760840 L NO 760840L NO 760840 A NO760840 A NO 760840A NO 760840 A NO760840 A NO 760840A NO 760840 L NO760840 L NO 760840L
- Authority
- NO
- Norway
- Prior art keywords
- slurry
- amine
- anionic
- surfactant
- flotation
- Prior art date
Links
- 239000004094 surface-active agent Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 50
- 239000000693 micelle Substances 0.000 claims description 46
- 238000005188 flotation Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 22
- 239000006185 dispersion Substances 0.000 claims description 18
- 125000000129 anionic group Chemical group 0.000 claims description 17
- -1 alkenyl amine Chemical class 0.000 claims description 13
- 239000003945 anionic surfactant Substances 0.000 claims description 13
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 238000004062 sedimentation Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 150000001412 amines Chemical class 0.000 claims description 12
- 125000002091 cationic group Chemical group 0.000 claims description 11
- 238000005189 flocculation Methods 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 230000016615 flocculation Effects 0.000 claims description 10
- 150000001768 cations Chemical class 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000005119 centrifugation Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 125000001931 aliphatic group Chemical group 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 239000013055 pulp slurry Substances 0.000 claims description 6
- 125000003342 alkenyl group Chemical group 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000008394 flocculating agent Substances 0.000 claims 2
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 claims 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims 1
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims 1
- 229910001424 calcium ion Inorganic materials 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical group CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims 1
- 125000005313 fatty acid group Chemical group 0.000 claims 1
- 229910001425 magnesium ion Inorganic materials 0.000 claims 1
- 229910021645 metal ion Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 31
- 239000000976 ink Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 16
- 239000002245 particle Substances 0.000 description 15
- 238000000926 separation method Methods 0.000 description 15
- 239000000344 soap Substances 0.000 description 11
- 229920000867 polyelectrolyte Polymers 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 239000000356 contaminant Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 244000144992 flock Species 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 230000020477 pH reduction Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 125000002877 alkyl aryl group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000002736 nonionic surfactant Substances 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 239000002761 deinking Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229920006158 high molecular weight polymer Polymers 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 206010034962 Photopsia Diseases 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229920001448 anionic polyelectrolyte Polymers 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 125000005228 aryl sulfonate group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- MOTZDAYCYVMXPC-UHFFFAOYSA-N dodecyl hydrogen sulfate Chemical compound CCCCCCCCCCCCOS(O)(=O)=O MOTZDAYCYVMXPC-UHFFFAOYSA-N 0.000 description 1
- 229940043264 dodecyl sulfate Drugs 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229920000831 ionic polymer Polymers 0.000 description 1
- 125000005645 linoleyl group Chemical group 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 125000005702 oxyalkylene group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910000065 phosphene Inorganic materials 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229960002796 polystyrene sulfonate Drugs 0.000 description 1
- 239000011970 polystyrene sulfonate Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229960005480 sodium caprylate Drugs 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- BYKRNSHANADUFY-UHFFFAOYSA-M sodium octanoate Chemical compound [Na+].CCCCCCCC([O-])=O BYKRNSHANADUFY-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 150000001629 stilbenes Chemical class 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
- D21C5/027—Chemicals therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7502720A SE406482B (sv) | 1975-03-11 | 1975-03-11 | Forfarande for rening av en vattenhaltig dispersion eller massauppslamning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO760840L true NO760840L (nl) | 1976-09-14 |
Family
ID=20323922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO760840A NO760840L (nl) | 1975-03-11 | 1976-03-10 |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4043908A (nl) |
| JP (1) | JPS5231563A (nl) |
| AT (1) | AT357862B (nl) |
| AU (1) | AU504797B2 (nl) |
| CA (1) | CA1068019A (nl) |
| DE (1) | DE2610277C3 (nl) |
| ES (1) | ES445941A1 (nl) |
| FI (1) | FI760583A (nl) |
| FR (1) | FR2313500A1 (nl) |
| GB (1) | GB1546813A (nl) |
| IT (1) | IT1057340B (nl) |
| NL (1) | NL7602000A (nl) |
| NO (1) | NO760840L (nl) |
| SE (1) | SE406482B (nl) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599190A (en) * | 1979-11-13 | 1986-07-08 | Diamond Shamrock Chemicals Company | Composition for drinking secondary fibers |
| SE439787B (sv) * | 1984-03-19 | 1985-07-01 | Berol Kemi Ab | Sett att reducera missfergning och/eller klibbighet vid upparbetning av avfallspapper |
| US4676912A (en) * | 1986-06-26 | 1987-06-30 | International Minerals & Chemical Corp. | Waste liquor disposal methods |
| DE3642362A1 (de) * | 1986-12-11 | 1988-06-16 | Schill & Seilacher | Mittel zur abtrennung dispergierter teilchen aus dispersionen |
| DE3811025A1 (de) * | 1988-03-31 | 1989-10-12 | Gruenau Gmbh Chem Fab | Verfahren zum de-inken von bedrucktem altpapier |
| WO1990004674A1 (en) * | 1988-10-26 | 1990-05-03 | Miranol Inc. | Method and composition for deinking recycled paper pulp |
| DE4007597A1 (de) * | 1990-03-09 | 1991-09-12 | Henkel Kgaa | Wasserloesliche oder wasserdispergierbare, polyetherketten und quaternaere ammoniumgruppen enthaltende verbindungen |
| DE4008894A1 (de) * | 1990-03-20 | 1991-09-26 | Call Hans Peter | Verfahren zur altpapieraufbereitung mit enzymatischer druckfarbenentfernung |
| US5385695A (en) * | 1990-05-15 | 1995-01-31 | Cohen; Elliot | Demulsifier methods employing b-iminodipropionate |
| US5286390A (en) * | 1992-09-30 | 1994-02-15 | Calgon Corporation | Method for treating deink wastes using melamine aldehyde-type polymers |
| US5415733A (en) * | 1993-05-27 | 1995-05-16 | High Point Chemical Corp. | Method of removing hydrophilic ink |
| US5320758A (en) * | 1993-06-29 | 1994-06-14 | Church & Dwight Co., Inc. | Method of recycling amine saponifiers used in cleaning electronic circuit boards |
| US5560805A (en) * | 1993-07-27 | 1996-10-01 | Hoechst Celanese Corporation | Enhanced decolorization of waste paper with selected amines |
| US5385639A (en) * | 1993-08-27 | 1995-01-31 | Hoechst Celanese Corporation | Deinking wastepaper printed with oil-based ink |
| AU677468B2 (en) * | 1994-02-02 | 1997-04-24 | Hercules Incorporated | Felt conditioner for deinked recycled newsprint papermaking systems |
| US5632857A (en) * | 1995-04-04 | 1997-05-27 | Rhone-Poulenc Inc. | Process for removing waterborne flexographic inks from substrates |
| CA2213823C (en) * | 1995-04-05 | 2005-07-05 | Kao Corporation | Deinking method |
| DE19532476A1 (de) * | 1995-09-02 | 1997-03-06 | Winfried Prof Dr Schmidt | Verfahren und Vorrichtung zur Behandlung von ölhaltigen Abwässern, insbesondere zur Trennung von Öl-in-Wasser-Emulsionen |
| JP3051826B2 (ja) | 1996-06-03 | 2000-06-12 | 花王株式会社 | 脱墨方法 |
| JP2958269B2 (ja) * | 1996-06-03 | 1999-10-06 | 花王株式会社 | 脱墨方法 |
| JP3405888B2 (ja) * | 1996-09-25 | 2003-05-12 | 花王株式会社 | 脱墨方法 |
| US6312559B1 (en) * | 1996-10-02 | 2001-11-06 | Kao Corporation | Deinking process using amine compounds and white water recycling |
| JP3262517B2 (ja) * | 1996-10-02 | 2002-03-04 | 花王株式会社 | 脱墨方法 |
| US20050119353A1 (en) * | 2001-09-25 | 2005-06-02 | Detorres Fernando A. | Contaminant eco-remedy and use method |
| WO2009093615A1 (ja) * | 2008-01-22 | 2009-07-30 | Lion Corporation | クラフトパルプ用洗浄剤及びそれを用いたクラフトパルプの製造方法 |
| FR3037084B1 (fr) * | 2015-06-02 | 2020-01-10 | Coatex | Procede de desencrage de papier de recuperation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2005742A (en) * | 1934-05-25 | 1935-06-25 | Pierre R Hines | Process for deinking imprinted paper |
| FR1472923A (fr) * | 1963-12-30 | 1967-03-17 | Hollifield Corp | Procédé pour clarifier des fluides effluents de déchets provenant du désencrage de papiers imprimés |
-
1975
- 1975-03-11 SE SE7502720A patent/SE406482B/xx unknown
-
1976
- 1976-02-19 AU AU11244/76A patent/AU504797B2/en not_active Expired
- 1976-02-26 NL NL7602000A patent/NL7602000A/nl not_active Application Discontinuation
- 1976-03-08 FI FI760583A patent/FI760583A/fi not_active Application Discontinuation
- 1976-03-09 AT AT172376A patent/AT357862B/de not_active IP Right Cessation
- 1976-03-09 IT IT4848676A patent/IT1057340B/it active
- 1976-03-10 ES ES445941A patent/ES445941A1/es not_active Expired
- 1976-03-10 NO NO760840A patent/NO760840L/no unknown
- 1976-03-10 CA CA247,582A patent/CA1068019A/en not_active Expired
- 1976-03-10 FR FR7606842A patent/FR2313500A1/fr active Granted
- 1976-03-11 GB GB982076A patent/GB1546813A/en not_active Expired
- 1976-03-11 JP JP2563776A patent/JPS5231563A/ja active Pending
- 1976-03-11 US US05/666,104 patent/US4043908A/en not_active Expired - Lifetime
- 1976-03-11 DE DE2610277A patent/DE2610277C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1546813A (en) | 1979-05-31 |
| FI760583A (nl) | 1976-09-12 |
| ATA172376A (de) | 1979-12-15 |
| CA1068019A (en) | 1979-12-11 |
| AU504797B2 (en) | 1979-11-01 |
| AT357862B (de) | 1980-08-11 |
| SE7502720L (sv) | 1976-09-13 |
| DE2610277C3 (de) | 1980-09-04 |
| DE2610277A1 (de) | 1976-09-23 |
| DE2610277B2 (de) | 1979-12-13 |
| SE406482B (sv) | 1979-02-12 |
| US4043908A (en) | 1977-08-23 |
| ES445941A1 (es) | 1977-05-16 |
| FR2313500B1 (nl) | 1979-10-05 |
| AU1124476A (en) | 1977-08-25 |
| NL7602000A (nl) | 1976-09-14 |
| IT1057340B (it) | 1982-03-10 |
| FR2313500A1 (fr) | 1976-12-31 |
| JPS5231563A (en) | 1977-03-10 |
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